Isolated Flyback Converter Without an Opto-Coupler The LT3574IMS#PBF is a switching regulator from Linear Technology (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** Linear Technology (Analog Devices)
- **Part Number:** LT3574IMS#PBF
- **Package:** MSOP-10
- **Type:** Isolated Flyback Converter
- **Input Voltage Range:** 3V to 40V
- **Output Voltage:** Adjustable (via external transformer)
- **Switching Frequency:** 200kHz to 1MHz (adjustable)
- **Maximum Output Power:** Up to 5W (depending on transformer)
- **Operating Temperature Range:** -40°C to +125°C
- **Primary-Side Regulation:** Yes (eliminates optocoupler)
- **Current Limit:** Adjustable
### **Descriptions:**
The LT3574IMS#PBF is a monolithic switching regulator designed for isolated flyback converter applications. It integrates a primary-side controller, eliminating the need for an optocoupler or additional feedback components. The device operates over a wide input voltage range and provides a regulated output by sensing the isolated output voltage directly from the flyback transformer’s primary-side waveform.
### **Features:**
- **Primary-Side Sensing:** No optocoupler required for feedback.
- **Wide Input Voltage Range:** 3V to 40V.
- **Adjustable Switching Frequency:** 200kHz to 1MHz.
- **Integrated Power Switch:** 1.5A, 40V NPN switch.
- **Soft-Start and Frequency Foldback:** For controlled startup and overload protection.
- **Adjustable Current Limit:** Enhances flexibility in design.
- **Thermal Shutdown Protection:** Prevents overheating.
- **Compact MSOP-10 Package:** Suitable for space-constrained applications.
This information is strictly based on the manufacturer's datasheet and technical specifications.
